$ git clone -n https://src.fedoraproject.org/rpms/xvidtune.git /var/lib/mock/f45-build-39158-732/root/chroot_tmpdir/scmroot/xvidtune
Cloning into '/var/lib/mock/f45-build-39158-732/root/chroot_tmpdir/scmroot/xvidtune'...
$ git fetch origin 083681d11037ab6d414ba4ef4cadc106d1904781:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xvidtune
 * [new ref]         083681d11037ab6d414ba4ef4cadc106d1904781 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 083681d move to forge macros