$ git clone -n https://src.fedoraproject.org/rpms/httpcomponents-project.git /var/lib/mock/f40-build-2193968-51481/root/chroot_tmpdir/scmroot/httpcomponents-project
Cloning into '/var/lib/mock/f40-build-2193968-51481/root/chroot_tmpdir/scmroot/httpcomponents-project'...
$ git fetch origin 8b21109495ea13e93b44fabe587da915920b2a6d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/httpcomponents-project
 * [new ref]         8b21109495ea13e93b44fabe587da915920b2a6d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b21109 Update javapackages test plan to f40