$ git clone -n https://src.fedoraproject.org/rpms/cylindrix.git /var/lib/mock/f41-build-1034593-18640/root/chroot_tmpdir/scmroot/cylindrix
Cloning into '/var/lib/mock/f41-build-1034593-18640/root/chroot_tmpdir/scmroot/cylindrix'...
$ git fetch origin db1f041d670be5f167e0dfdf814c723ee8057b18:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cylindrix
 * [new ref]         db1f041d670be5f167e0dfdf814c723ee8057b18 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at db1f041 Eliminate use of obsolete %patchN syntax (#2283636)