$ git clone -n https://src.fedoraproject.org/rpms/rust-names.git /var/lib/mock/f41-build-810816-146959/root/chroot_tmpdir/scmroot/rust-names
Cloning into '/var/lib/mock/f41-build-810816-146959/root/chroot_tmpdir/scmroot/rust-names'...
$ git fetch origin 81ecc214e58428f85287ce90c39b0d147b1fcdfc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-names
 * [new ref]         81ecc214e58428f85287ce90c39b0d147b1fcdfc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81ecc21 Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces