$ git clone -n https://src.fedoraproject.org/rpms/swell-foop.git /var/lib/mock/f42-build-side-1-3500786-45971/root/chroot_tmpdir/scmroot/swell-foop
Cloning into '/var/lib/mock/f42-build-side-1-3500786-45971/root/chroot_tmpdir/scmroot/swell-foop'...
$ git fetch origin f25f7df74d546bcd41b5c602683db218964a16bd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/swell-foop
 * [new ref]         f25f7df74d546bcd41b5c602683db218964a16bd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f25f7df Update to 48.1