$ git clone -n https://src.fedoraproject.org/rpms/rust-difftastic.git /var/lib/mock/f41-build-733340-13201/root/chroot_tmpdir/scmroot/rust-difftastic
Cloning into '/var/lib/mock/f41-build-733340-13201/root/chroot_tmpdir/scmroot/rust-difftastic'...
$ git fetch origin 4b15c09fb26a94a8d114b8a1487192e7fddf4d06:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-difftastic
 * [new ref]         4b15c09fb26a94a8d114b8a1487192e7fddf4d06 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b15c09 Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces