$ git clone -n https://src.fedoraproject.org/rpms/rust-git-delta.git /var/lib/mock/f41-build-810928-146985/root/chroot_tmpdir/scmroot/rust-git-delta
Cloning into '/var/lib/mock/f41-build-810928-146985/root/chroot_tmpdir/scmroot/rust-git-delta'...
$ git fetch origin c2911d45f55e6e0bff683c5e1c1b016454a9c586:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-git-delta
 * [new ref]         c2911d45f55e6e0bff683c5e1c1b016454a9c586 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c2911d4 Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces