$ git clone -n https://src.fedoraproject.org/rpms/xbiso.git /var/lib/mock/f41-build-726075-13125/root/chroot_tmpdir/scmroot/xbiso
Cloning into '/var/lib/mock/f41-build-726075-13125/root/chroot_tmpdir/scmroot/xbiso'...
$ git fetch origin cd8018c869d04cd492cd00edb453549119b9190e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xbiso
 * [new ref]         cd8018c869d04cd492cd00edb453549119b9190e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd8018c Eliminate use of obsolete %patchN syntax (#2283636)