$ git clone -n https://src.fedoraproject.org/rpms/pypy.git /var/lib/mock/f45-build-53666-928/root/chroot_tmpdir/scmroot/pypy
Cloning into '/var/lib/mock/f45-build-53666-928/root/chroot_tmpdir/scmroot/pypy'...
$ git fetch origin 93e8708630575d4b3f1cf0e0416b315b9cd3ac7d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pypy
 * [new ref]         93e8708630575d4b3f1cf0e0416b315b9cd3ac7d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 93e8708 Update to 7.3.23 (rhbz#2481415)