$ git clone -n https://src.fedoraproject.org/rpms/rust-rd-hashd.git /var/lib/mock/f41-build-705883-13001/root/chroot_tmpdir/scmroot/rust-rd-hashd
Cloning into '/var/lib/mock/f41-build-705883-13001/root/chroot_tmpdir/scmroot/rust-rd-hashd'...
$ git fetch origin 3ee2815ce985cb495597c754a8f27908c2425d47:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rd-hashd
 * [new ref]         3ee2815ce985cb495597c754a8f27908c2425d47 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ee2815 Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces