$ git clone -n https://src.fedoraproject.org/rpms/python-flask-caching.git /var/lib/mock/f39-build-1521490-35842/root/chroot_tmpdir/scmroot/python-flask-caching
Cloning into '/var/lib/mock/f39-build-1521490-35842/root/chroot_tmpdir/scmroot/python-flask-caching'...
$ git fetch origin 35a4e34044333df82dccebb8a448d834eecc6770:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-flask-caching
 * [new ref]         35a4e34044333df82dccebb8a448d834eecc6770 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 35a4e34 Update to 2.1.0 (Fixes RHBZ#2160841)