$ git clone -n https://src.fedoraproject.org/rpms/rust-copydeps.git /var/lib/mock/f41-build-810567-146786/root/chroot_tmpdir/scmroot/rust-copydeps
Cloning into '/var/lib/mock/f41-build-810567-146786/root/chroot_tmpdir/scmroot/rust-copydeps'...
$ git fetch origin d81a2780a519a13ba48a185ab26c55ba023e382c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-copydeps
 * [new ref]         d81a2780a519a13ba48a185ab26c55ba023e382c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d81a278 Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces