$ git clone -n https://src.fedoraproject.org/rpms/moby-engine.git /var/lib/mock/f41-build-846578-163119/root/chroot_tmpdir/scmroot/moby-engine
Cloning into '/var/lib/mock/f41-build-846578-163119/root/chroot_tmpdir/scmroot/moby-engine'...
$ git fetch origin 4e91fc014aa4c7c50c2a52d80dce43a83f23b1d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/moby-engine
 * [new ref]         4e91fc014aa4c7c50c2a52d80dce43a83f23b1d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e91fc0 Update to 27.1.2. Fixes rhbz#2274717.