$ git clone -n https://src.fedoraproject.org/rpms/source-highlight.git /var/lib/mock/f40-build-2260885-54424/root/chroot_tmpdir/scmroot/source-highlight
Cloning into '/var/lib/mock/f40-build-2260885-54424/root/chroot_tmpdir/scmroot/source-highlight'...
$ git fetch origin 5afd974ee7cc7a13b2e5c3543cda9a243286f519:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/source-highlight
 * [new ref]         5afd974ee7cc7a13b2e5c3543cda9a243286f519 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5afd974 Rebuilt for Boost 1.83