$ git clone -n https://src.fedoraproject.org/rpms/autotrace.git /var/lib/mock/f45-build-2282-312/root/chroot_tmpdir/scmroot/autotrace
Cloning into '/var/lib/mock/f45-build-2282-312/root/chroot_tmpdir/scmroot/autotrace'...
$ git fetch origin 5b81f7b58ad7320493160e4792dc9ac8f9dc6c3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/autotrace
 * [new ref]         5b81f7b58ad7320493160e4792dc9ac8f9dc6c3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b81f7b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild