$ git clone -n https://src.fedoraproject.org/rpms/rust-tiny-dfr.git /var/lib/mock/f41-build-810709-146907/root/chroot_tmpdir/scmroot/rust-tiny-dfr
Cloning into '/var/lib/mock/f41-build-810709-146907/root/chroot_tmpdir/scmroot/rust-tiny-dfr'...
$ git fetch origin 22a4096054918078273cfe4fb5de1e25cfa0588e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tiny-dfr
 * [new ref]         22a4096054918078273cfe4fb5de1e25cfa0588e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 22a4096 Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces