$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_basenc.git /var/lib/mock/f41-build-810775-146939/root/chroot_tmpdir/scmroot/rust-uu_basenc
Cloning into '/var/lib/mock/f41-build-810775-146939/root/chroot_tmpdir/scmroot/rust-uu_basenc'...
$ git fetch origin 24e0b4a14724a097bf51bd9ba6ec0e3dad358deb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_basenc
 * [new ref]         24e0b4a14724a097bf51bd9ba6ec0e3dad358deb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 24e0b4a Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces