$ git clone -n https://src.fedoraproject.org/rpms/mythes-cs.git /var/lib/mock/f40-build-2012316-45782/root/chroot_tmpdir/scmroot/mythes-cs
Cloning into '/var/lib/mock/f40-build-2012316-45782/root/chroot_tmpdir/scmroot/mythes-cs'...
$ git fetch origin a2f26240bdb21d9f8a5f8387b435e7d2a8c1f10e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mythes-cs
 * [new ref]         a2f26240bdb21d9f8a5f8387b435e7d2a8c1f10e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a2f2624 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild