$ git clone -n https://src.fedoraproject.org/rpms/moby-engine.git /var/lib/mock/f41-build-756028-13417/root/chroot_tmpdir/scmroot/moby-engine
Cloning into '/var/lib/mock/f41-build-756028-13417/root/chroot_tmpdir/scmroot/moby-engine'...
$ git fetch origin ba9da2ef3dafcd656bcd7101472bb8c05be215b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/moby-engine
 * [new ref]         ba9da2ef3dafcd656bcd7101472bb8c05be215b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba9da2e Remove separate specfile license file