$ git clone -n https://src.fedoraproject.org/rpms/rust-cargo-config2.git /var/lib/mock/f38-build-side-43-rust-devel-1397576-31052/root/chroot_tmpdir/scmroot/rust-cargo-config2
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1397576-31052/root/chroot_tmpdir/scmroot/rust-cargo-config2'...
$ git fetch origin 20c3fbc0018747d8f863f65a8a8e1112b92d37d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cargo-config2
 * [new ref]         20c3fbc0018747d8f863f65a8a8e1112b92d37d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20c3fbc Update to version 0.1.11; Fixes RHBZ#2219422