$ git clone -n https://src.fedoraproject.org/rpms/joe.git /var/lib/mock/f41-build-786002-13590/root/chroot_tmpdir/scmroot/joe
Cloning into '/var/lib/mock/f41-build-786002-13590/root/chroot_tmpdir/scmroot/joe'...
$ git fetch origin 1e42eae246abd1047cb3ea8c104341123e9a1419:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/joe
 * [new ref]         1e42eae246abd1047cb3ea8c104341123e9a1419 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e42eae Eliminate use of obsolete %patchN syntax (#2283636)