$ git clone -n https://src.fedoraproject.org/forks/music/rpms/sleef.git /var/lib/mock/f43-build-58924792-6569304/root/chroot_tmpdir/scmroot/sleef
Cloning into '/var/lib/mock/f43-build-58924792-6569304/root/chroot_tmpdir/scmroot/sleef'...
$ git fetch origin a18465077def557bb50af64aec7d3ff75e5412ba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/music/rpms/sleef
 * [new ref]         a18465077def557bb50af64aec7d3ff75e5412ba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a184650 Update to 3.9.0 (close RHBZ#2355181)