$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_date.git /var/lib/mock/f40-build-704027-12986/root/chroot_tmpdir/scmroot/rust-uu_date
Cloning into '/var/lib/mock/f40-build-704027-12986/root/chroot_tmpdir/scmroot/rust-uu_date'...
$ git fetch origin 90ffc02f58d8c4928deffecdfb409f8755106bc9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_date
 * [new ref]         90ffc02f58d8c4928deffecdfb409f8755106bc9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90ffc02 Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces