$ git clone -n https://src.fedoraproject.org/rpms/rust-text-block-macros.git /var/lib/mock/f38-build-side-42-init-devel-648802-26458/root/chroot_tmpdir/scmroot/rust-text-block-macros
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-648802-26458/root/chroot_tmpdir/scmroot/rust-text-block-macros'...
$ git fetch origin c328d8c2639547eaca0303dd1727fa5b2b61935a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-text-block-macros
 * [new ref]         c328d8c2639547eaca0303dd1727fa5b2b61935a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c328d8c Added the README