This Y-DNA (r-fta62902) came to Anatolia with Turkish migrations but later became Zaza. and then probably became Turkified recently. Its autosomal DNA is like Zaza. Its tribe and village are also Zaza. But the some family members  claims to be Turkish (grandfather and father).  (disputed. Some Gezik's claim to be Kurdish, but they belong to other branches of the family.  ) 
followed this path:
Tian shan Hun>Medieval Turkic>Anatolian Turkish>Zaza>Turkish
Under this Y-DNA there are 2 Turks (but their autosomal is Zaza. From Deman and Ashuran tribes), 3 Kurds (Şadi, İzol and Canbeg) and a scientific sample (zaza-turkish mix). 
Y-DNAs that were different from the Zazas in the region were found from the Deman and Ashuran tribes. Also, 1 Zaza from the Deman tribe had an autosomal DNA result of Turkish-Zaza mixture. But there was no known mixture. In the similarity list, Turkic peoples were in the top 6. Also, in Mazgirt, a PH155’s similarity list had ‘Turkish Tunceli’ in the first place, with 3.7% East Eurasian.
My Gedmatch:PB1787229
Maybe Deman and Ashuran tribes might have joined the Zazas later, but there is no written source. 
Demu, Demo, Dem

August 23, 2025 update:
All PH155 > PH200 > R-fta62902 in Dersim region
1-) Aşuran Ergan (Turkish)  2-) Deman Ergan (Turkish) 3-) Bağpınar Erzincan, 4-) izol Mazgirt geçitveren, 5-) Şadi Zimtek Bingöl, 6-) izol 7-) scientific example, 8-) someone with the surname Aksoy, 9-) someone from Mazgirt, 10-) izol Mazgirt geçitveren (Turkish). Founder effect, tmrca is around 500
All have different surnames. There may be more. I may not have recorded it. 
Possibilities:
1-Local Turks--)Kurdish Alevis (most likely)
2-Turkish Alevis fleeing the Ottomans--)Kurds
3-)Emirate of Çemişgezek (saltukids or seljuks)--)Kurds 
4-)Kushans--)Sasanians (very unlikely)

about possibility 3: One possibility is that fta62902 could be related to Pir Hüseyin. One person thought to be a descendant of Pir Hüseyin had a result of J-ZS3128, but it's unusual for the region, and it wasn't found in Tunceli. Therefore, I consider it unlikely to be J-ZS3128. Other individuals claimed to be descendants of Pir Hüseyin need DNA testing.  fta62902 is the only Turkish paternal lineage found in Tunceli, and it is also the most common one. Among the Kurds, there are Jews (origin khazars)  in the upper branch, and Turks from Konya. This fits the Seljuk>emirate of çemişgezek narrative. Consistent TMRCA for the Çemişgezek Emirate.

about possiblity 2:There is a village called Çavuşlu in Ovacık – nearby, a PH155 was found. Their legend says that in the 1500s, some people who fled from the Ottomans took refuge there. Also, there is Zimtek, where another PH155 was found, and their legend says that the village was founded by someone from Konya.

FTDNA Big Y (vcf)