$ git clone -n https://src.fedoraproject.org/rpms/plasma-mobile.git /var/lib/mock/f41-build-847800-164127/root/chroot_tmpdir/scmroot/plasma-mobile
Cloning into '/var/lib/mock/f41-build-847800-164127/root/chroot_tmpdir/scmroot/plasma-mobile'...
$ git fetch origin c6bc936cde45cbd3c9312f676e132887002b04b6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-mobile
 * [new ref]         c6bc936cde45cbd3c9312f676e132887002b04b6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6bc936 6.1.5