$ git clone -n https://src.fedoraproject.org/rpms/python-flask-babel.git /var/lib/mock/f40-build-2213652-52345/root/chroot_tmpdir/scmroot/python-flask-babel
Cloning into '/var/lib/mock/f40-build-2213652-52345/root/chroot_tmpdir/scmroot/python-flask-babel'...
$ git fetch origin 19fdac7cceb52915421374018f2e2bb7d6acde33:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-flask-babel
 * [new ref]         19fdac7cceb52915421374018f2e2bb7d6acde33 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19fdac7 Update to 4.0.0