$ git clone -n https://src.fedoraproject.org/rpms/rust-cargo-config2.git /var/lib/mock/f38-build-side-42-init-devel-755132-27676/root/chroot_tmpdir/scmroot/rust-cargo-config2
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-755132-27676/root/chroot_tmpdir/scmroot/rust-cargo-config2'...
$ git fetch origin f2339b031b4bb8514e9be0b4f865333fc3d06187:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cargo-config2
 * [new ref]         f2339b031b4bb8514e9be0b4f865333fc3d06187 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2339b0 Added the README