$ git clone -n https://src.fedoraproject.org/rpms/rust-procs.git /var/lib/mock/f41-build-810658-146867/root/chroot_tmpdir/scmroot/rust-procs
Cloning into '/var/lib/mock/f41-build-810658-146867/root/chroot_tmpdir/scmroot/rust-procs'...
$ git fetch origin 729c4de39b6d643684f5d9a16979cbfc9579ff7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-procs
 * [new ref]         729c4de39b6d643684f5d9a16979cbfc9579ff7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 729c4de Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces