$ git clone -n https://src.fedoraproject.org/rpms/libXmu.git /var/lib/mock/f40-build-784811-133588/root/chroot_tmpdir/scmroot/libXmu
Cloning into '/var/lib/mock/f40-build-784811-133588/root/chroot_tmpdir/scmroot/libXmu'...
$ git fetch origin fe57bc946e212ac28ad0c30c96617f4572d9447c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libXmu
 * [new ref]         fe57bc946e212ac28ad0c30c96617f4572d9447c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe57bc9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild