$ git clone -n https://src.fedoraproject.org/rpms/mscgen.git /var/lib/mock/f40-build-802768-144093/root/chroot_tmpdir/scmroot/mscgen
Cloning into '/var/lib/mock/f40-build-802768-144093/root/chroot_tmpdir/scmroot/mscgen'...
$ git fetch origin 2d260e8174d97a9673d7dc27bbdfd2e12a07f805:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mscgen
 * [new ref]         2d260e8174d97a9673d7dc27bbdfd2e12a07f805 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d260e8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild