$ git clone -n https://src.fedoraproject.org/rpms/mangohud.git /var/lib/mock/f45-build-18009-506/root/chroot_tmpdir/scmroot/mangohud
Cloning into '/var/lib/mock/f45-build-18009-506/root/chroot_tmpdir/scmroot/mangohud'...
$ git fetch origin c0d68d0976ab1e61d2361ea2a8429346bc89b5a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mangohud
 * [new ref]         c0d68d0976ab1e61d2361ea2a8429346bc89b5a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c0d68d0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild