$ git clone -n https://src.fedoraproject.org/rpms/rust-convert_case.git /var/lib/mock/f42-build-side-1-3512487-46069/root/chroot_tmpdir/scmroot/rust-convert_case
Cloning into '/var/lib/mock/f42-build-side-1-3512487-46069/root/chroot_tmpdir/scmroot/rust-convert_case'...
$ git fetch origin 48295425a8f7b80d094a85dc4b90220c96eec120:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-convert_case
 * [new ref]         48295425a8f7b80d094a85dc4b90220c96eec120 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4829542 Update to version 0.7.1