$ git clone -n https://src.fedoraproject.org/rpms/erlang-gen_leader.git /var/lib/mock/f41-build-side-1-2811255-32927/root/chroot_tmpdir/scmroot/erlang-gen_leader
Cloning into '/var/lib/mock/f41-build-side-1-2811255-32927/root/chroot_tmpdir/scmroot/erlang-gen_leader'...
$ git fetch origin 44bb439378757fe6dd7788813228f0faaaab6800:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-gen_leader
 * [new ref]         44bb439378757fe6dd7788813228f0faaaab6800 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 44bb439 Cosmetic changes