$ git clone -n https://src.fedoraproject.org/rpms/rust-rstest.git /var/lib/mock/f38-build-side-42-init-devel-1085733-30004/root/chroot_tmpdir/scmroot/rust-rstest
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1085733-30004/root/chroot_tmpdir/scmroot/rust-rstest'...
$ git fetch origin 368ec39242e734297a823d000fc06a91fd314eb0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rstest
 * [new ref]         368ec39242e734297a823d000fc06a91fd314eb0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 368ec39 Initial Fedora package