$ git clone -n https://src.fedoraproject.org/rpms/rust.git /var/lib/mock/f41-build-861217-169528/root/chroot_tmpdir/scmroot/rust
Cloning into '/var/lib/mock/f41-build-861217-169528/root/chroot_tmpdir/scmroot/rust'...
$ git fetch origin 5b4a0fd51abd7fb5a0c8ab893ada0b1788adc615:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust
 * [new ref]         5b4a0fd51abd7fb5a0c8ab893ada0b1788adc615 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b4a0fd Update to Rust 1.82.0