$ git clone -n https://src.fedoraproject.org/rpms/assertj-core.git /var/lib/mock/f40-build-2250610-54067/root/chroot_tmpdir/scmroot/assertj-core
Cloning into '/var/lib/mock/f40-build-2250610-54067/root/chroot_tmpdir/scmroot/assertj-core'...
$ git fetch origin 69334ad306c6d22fc2d4f38d347a6dbb41ffd83e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/assertj-core
 * [new ref]         69334ad306c6d22fc2d4f38d347a6dbb41ffd83e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 69334ad Update javapackages test plan to f40