$ git clone -n https://src.fedoraproject.org/rpms/rust-crosstermion.git /var/lib/mock/f38-build-side-43-rust-devel-1397477-31052/root/chroot_tmpdir/scmroot/rust-crosstermion
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1397477-31052/root/chroot_tmpdir/scmroot/rust-crosstermion'...
$ git fetch origin b23c382cfcb25a01d457a195facba2b25f541ea3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-crosstermion
 * [new ref]         b23c382cfcb25a01d457a195facba2b25f541ea3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b23c382 Update to version 0.10.1