$ git clone -n https://src.fedoraproject.org/rpms/gource.git /var/lib/mock/f40-build-2264002-54545/root/chroot_tmpdir/scmroot/gource
Cloning into '/var/lib/mock/f40-build-2264002-54545/root/chroot_tmpdir/scmroot/gource'...
$ git fetch origin a07bb2d1374ea2946ea74220f5ca647f53a9986c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gource
 * [new ref]         a07bb2d1374ea2946ea74220f5ca647f53a9986c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a07bb2d Rebuilt for Boost 1.83