$ git clone -n https://src.fedoraproject.org/rpms/openh264.git /var/lib/mock/f45-build-21074-578/root/chroot_tmpdir/scmroot/openh264
Cloning into '/var/lib/mock/f45-build-21074-578/root/chroot_tmpdir/scmroot/openh264'...
$ git fetch origin cd152284845eb42871a59e3ad4afc2a60543310e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openh264
 * [new ref]         cd152284845eb42871a59e3ad4afc2a60543310e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd15228 Rebuild for newer releases