$ git clone -n https://src.fedoraproject.org/rpms/rust-cargo.git /var/lib/mock/f38-build-side-43-rust-devel-1397117-31052/root/chroot_tmpdir/scmroot/rust-cargo
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1397117-31052/root/chroot_tmpdir/scmroot/rust-cargo'...
$ git fetch origin 9f0acc8b3312e4b779eb53f514464221426508ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cargo
 * [new ref]         9f0acc8b3312e4b779eb53f514464221426508ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f0acc8 Update to version 0.70.1