$ git clone -n https://src.fedoraproject.org/rpms/python-teamcity-messages.git /var/lib/mock/f39-build-1426399-31596/root/chroot_tmpdir/scmroot/python-teamcity-messages
Cloning into '/var/lib/mock/f39-build-1426399-31596/root/chroot_tmpdir/scmroot/python-teamcity-messages'...
$ git fetch origin abe4eecd8ee849b1639a5bf54820c6202aca2dec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-teamcity-messages
 * [new ref]         abe4eecd8ee849b1639a5bf54820c6202aca2dec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at abe4eec Add pull_from_upstream packit feature in config