$ git clone -n https://src.fedoraproject.org/rpms/rust-libcramjam.git /var/lib/mock/f41-build-side-1-2798017-32753/root/chroot_tmpdir/scmroot/rust-libcramjam
Cloning into '/var/lib/mock/f41-build-side-1-2798017-32753/root/chroot_tmpdir/scmroot/rust-libcramjam'...
$ git fetch origin 231fbbbe6b5657d336a1d5ea7ae0ee9578ba5680:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libcramjam
 * [new ref]         231fbbbe6b5657d336a1d5ea7ae0ee9578ba5680 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 231fbbb Update brotli from 3.x to 6.x