$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_fmt.git /var/lib/mock/f41-build-810496-146724/root/chroot_tmpdir/scmroot/rust-uu_fmt
Cloning into '/var/lib/mock/f41-build-810496-146724/root/chroot_tmpdir/scmroot/rust-uu_fmt'...
$ git fetch origin fb5eab703b9d19a3dd781f0482f1526ee11b544c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_fmt
 * [new ref]         fb5eab703b9d19a3dd781f0482f1526ee11b544c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb5eab7 Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces