$ git clone -n https://src.fedoraproject.org/rpms/python-extension-helpers.git /var/lib/mock/f40-build-2213627-52344/root/chroot_tmpdir/scmroot/python-extension-helpers
Cloning into '/var/lib/mock/f40-build-2213627-52344/root/chroot_tmpdir/scmroot/python-extension-helpers'...
$ git fetch origin aaf3373e976a26842949503b69b62648a6dda523:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-extension-helpers
 * [new ref]         aaf3373e976a26842949503b69b62648a6dda523 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aaf3373 New release 1.1.1