$ git clone -n https://src.fedoraproject.org/rpms/scotch.git /var/lib/mock/f42-build-3402231-45132/root/chroot_tmpdir/scmroot/scotch
Cloning into '/var/lib/mock/f42-build-3402231-45132/root/chroot_tmpdir/scmroot/scotch'...
$ git fetch origin 33b12e182791cbca3c40596659614a147c431912:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/scotch
 * [new ref]         33b12e182791cbca3c40596659614a147c431912 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 33b12e1 Update to 7.0.7