$ git clone -n https://src.fedoraproject.org/rpms/libalkimia.git /var/lib/mock/f41-build-848825-164582/root/chroot_tmpdir/scmroot/libalkimia
Cloning into '/var/lib/mock/f41-build-848825-164582/root/chroot_tmpdir/scmroot/libalkimia'...
$ git fetch origin 227fe8678cf552c900bea911c6342b80646cea17:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libalkimia
 * [new ref]         227fe8678cf552c900bea911c6342b80646cea17 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 227fe86 8.1.2