$ git clone -n https://src.fedoraproject.org/rpms/moby-engine.git /var/lib/mock/f42-build-867060-174622/root/chroot_tmpdir/scmroot/moby-engine
Cloning into '/var/lib/mock/f42-build-867060-174622/root/chroot_tmpdir/scmroot/moby-engine'...
$ git fetch origin c1835325f87f0a068dec42243a35ab3a3963a8e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/moby-engine
 * [new ref]         c1835325f87f0a068dec42243a35ab3a3963a8e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c183532 Update to release v27.4.1