$ git clone -n https://src.fedoraproject.org/rpms/actor-framework.git /var/lib/mock/f42-build-885423-186791/root/chroot_tmpdir/scmroot/actor-framework
Cloning into '/var/lib/mock/f42-build-885423-186791/root/chroot_tmpdir/scmroot/actor-framework'...
$ git fetch origin 883da8498f36af99aa2eddc9bdc0a929d3c6ebbb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/actor-framework
 * [new ref]         883da8498f36af99aa2eddc9bdc0a929d3c6ebbb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 883da84 update to latest git commit