$ git clone -n https://src.fedoraproject.org/rpms/ocean-sound-theme.git /var/lib/mock/f42-build-3426617-45197/root/chroot_tmpdir/scmroot/ocean-sound-theme
Cloning into '/var/lib/mock/f42-build-3426617-45197/root/chroot_tmpdir/scmroot/ocean-sound-theme'...
$ git fetch origin ea0fa64af4801249ffaed8536b1704aaf0b50091:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocean-sound-theme
 * [new ref]         ea0fa64af4801249ffaed8536b1704aaf0b50091 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea0fa64 6.3.3