$ git clone -n https://src.fedoraproject.org/rpms/gigolo.git /var/lib/mock/f40-build-752696-116820/root/chroot_tmpdir/scmroot/gigolo
Cloning into '/var/lib/mock/f40-build-752696-116820/root/chroot_tmpdir/scmroot/gigolo'...
$ git fetch origin ea4239416b7ba5ab61f2e217a1fc7d996d0dc200:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gigolo
 * [new ref]         ea4239416b7ba5ab61f2e217a1fc7d996d0dc200 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea42394 Update to v0.5.3