$ git clone -n https://src.fedoraproject.org/rpms/gource.git /var/lib/mock/f45-build-12922-444/root/chroot_tmpdir/scmroot/gource
Cloning into '/var/lib/mock/f45-build-12922-444/root/chroot_tmpdir/scmroot/gource'...
$ git fetch origin 60d04a5f4fd7c7f85cabfbe135b11cc0ea2d2eb4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gource
 * [new ref]         60d04a5f4fd7c7f85cabfbe135b11cc0ea2d2eb4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 60d04a5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild