$ git clone -n https://src.fedoraproject.org/rpms/rust-test-case-macros.git /var/lib/mock/f38-build-side-43-rust-devel-1418422-31459/root/chroot_tmpdir/scmroot/rust-test-case-macros
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1418422-31459/root/chroot_tmpdir/scmroot/rust-test-case-macros'...
$ git fetch origin 7ef0e90cfba4604e9beb8bd4abd372d86fdac14b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-test-case-macros
 * [new ref]         7ef0e90cfba4604e9beb8bd4abd372d86fdac14b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ef0e90 Initial import (#2173716)