$ git clone -n https://src.fedoraproject.org/rpms/powerdevil.git /var/lib/mock/f39-build-1810912-41829/root/chroot_tmpdir/scmroot/powerdevil
Cloning into '/var/lib/mock/f39-build-1810912-41829/root/chroot_tmpdir/scmroot/powerdevil'...
$ git fetch origin e14ba44a040114660b05ca536326dd8a0319fdd9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/powerdevil
 * [new ref]         e14ba44a040114660b05ca536326dd8a0319fdd9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e14ba44 Merge branch 'rawhide' into f39