$ git clone -n https://src.fedoraproject.org/rpms/device-mapper-persistent-data.git /var/lib/mock/f39-build-1926227-43041/root/chroot_tmpdir/scmroot/device-mapper-persistent-data
Cloning into '/var/lib/mock/f39-build-1926227-43041/root/chroot_tmpdir/scmroot/device-mapper-persistent-data'...
$ git fetch origin a6ab2577d82b57744cae2133291c31c672da8a3a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/device-mapper-persistent-data
 * [new ref]         a6ab2577d82b57744cae2133291c31c672da8a3a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6ab257 Fix ioctl call on ppc64le breaking installation.