$ git clone -n https://src.fedoraproject.org/rpms/f3d.git /var/lib/mock/f41-build-813712-148788/root/chroot_tmpdir/scmroot/f3d
Cloning into '/var/lib/mock/f41-build-813712-148788/root/chroot_tmpdir/scmroot/f3d'...
$ git fetch origin 347eb0755bef96504bbf0472ed09af6d8ef92f77:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/f3d
 * [new ref]         347eb0755bef96504bbf0472ed09af6d8ef92f77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 347eb07 2.5.0