$ git clone -n https://src.fedoraproject.org/rpms/python-gmpy2.git /var/lib/mock/f41-build-822233-153091/root/chroot_tmpdir/scmroot/python-gmpy2
Cloning into '/var/lib/mock/f41-build-822233-153091/root/chroot_tmpdir/scmroot/python-gmpy2'...
$ git fetch origin 3c3aa7817b9d1742789ba2d917250e1bd79425f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-gmpy2
 * [new ref]         3c3aa7817b9d1742789ba2d917250e1bd79425f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c3aa78 Version 2.2.1