$ git clone -n https://src.fedoraproject.org/rpms/libgbinder.git /var/lib/mock/f40-build-785850-134129/root/chroot_tmpdir/scmroot/libgbinder
Cloning into '/var/lib/mock/f40-build-785850-134129/root/chroot_tmpdir/scmroot/libgbinder'...
$ git fetch origin cf12095e7c194e17e5142cdccc13e940aad2c5ae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgbinder
 * [new ref]         cf12095e7c194e17e5142cdccc13e940aad2c5ae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf12095 1.1.36