$ git clone -n https://src.fedoraproject.org/rpms/rust-test-case-macros2.git /var/lib/mock/f38-build-side-43-rust-devel-1419405-31460/root/chroot_tmpdir/scmroot/rust-test-case-macros2
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1419405-31460/root/chroot_tmpdir/scmroot/rust-test-case-macros2'...
$ git fetch origin 160255ceb58a0230e79b2d5ca93ff042e34ca435:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-test-case-macros2
 * [new ref]         160255ceb58a0230e79b2d5ca93ff042e34ca435 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 160255c Added the README