$ git clone -n https://src.fedoraproject.org/rpms/rosegarden4.git /var/lib/mock/f45-build-34613-688/root/chroot_tmpdir/scmroot/rosegarden4
Cloning into '/var/lib/mock/f45-build-34613-688/root/chroot_tmpdir/scmroot/rosegarden4'...
$ git fetch origin 04802a73791c8c135579dd6b18f15c0ac90573a2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rosegarden4
 * [new ref]         04802a73791c8c135579dd6b18f15c0ac90573a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04802a7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild