$ git clone -n https://src.fedoraproject.org/rpms/golang-github-cockroachdb-cmux.git /var/lib/mock/f40-build-2493972-61664/root/chroot_tmpdir/scmroot/golang-github-cockroachdb-cmux
Cloning into '/var/lib/mock/f40-build-2493972-61664/root/chroot_tmpdir/scmroot/golang-github-cockroachdb-cmux'...
$ git fetch origin fecbcf24e33adcdcb682cc9944197cfd37d98ab2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-cockroachdb-cmux
 * [new ref]         fecbcf24e33adcdcb682cc9944197cfd37d98ab2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fecbcf2 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild