$ git clone -n https://src.fedoraproject.org/rpms/bless.git /var/lib/mock/f41-build-786013-13590/root/chroot_tmpdir/scmroot/bless
Cloning into '/var/lib/mock/f41-build-786013-13590/root/chroot_tmpdir/scmroot/bless'...
$ git fetch origin 6a4ec92f51dfd312feafeb56c794b5c498664c43:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bless
 * [new ref]         6a4ec92f51dfd312feafeb56c794b5c498664c43 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a4ec92 Eliminate use of obsolete %patchN syntax (#2283636)