$ git clone -n https://src.fedoraproject.org/rpms/xaos.git /var/lib/mock/f40-build-2250205-54038/root/chroot_tmpdir/scmroot/xaos
Cloning into '/var/lib/mock/f40-build-2250205-54038/root/chroot_tmpdir/scmroot/xaos'...
$ git fetch origin 56c3304c276af006d5abcb7c6b7d921cc0d82fbf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xaos
 * [new ref]         56c3304c276af006d5abcb7c6b7d921cc0d82fbf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56c3304 Fix .desktop file name