$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_false.git /var/lib/mock/f41-build-810845-146971/root/chroot_tmpdir/scmroot/rust-uu_false
Cloning into '/var/lib/mock/f41-build-810845-146971/root/chroot_tmpdir/scmroot/rust-uu_false'...
$ git fetch origin 801a60d8fe07e21bec4ff6aacf32ea39fddc8200:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_false
 * [new ref]         801a60d8fe07e21bec4ff6aacf32ea39fddc8200 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 801a60d Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces