$ git clone -n https://src.fedoraproject.org/rpms/pluma.git /var/lib/mock/f42-build-side-1-3537756-46560/root/chroot_tmpdir/scmroot/pluma
Cloning into '/var/lib/mock/f42-build-side-1-3537756-46560/root/chroot_tmpdir/scmroot/pluma'...
$ git fetch origin 2c0ad0bdaf9664f4664f3e03f1a49ce670e067ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pluma
 * [new ref]         2c0ad0bdaf9664f4664f3e03f1a49ce670e067ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c0ad0b add some upstream commits