$ git clone -n https://src.fedoraproject.org/rpms/pingus.git /var/lib/mock/f42-build-side-1-3554980-46650/root/chroot_tmpdir/scmroot/pingus
Cloning into '/var/lib/mock/f42-build-side-1-3554980-46650/root/chroot_tmpdir/scmroot/pingus'...
$ git fetch origin 506b3a1c3d0c2cf534bff184123e7e10c375cb17:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pingus
 * [new ref]         506b3a1c3d0c2cf534bff184123e7e10c375cb17 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 506b3a1 Add better quality desktop icon