$ git clone -n https://src.fedoraproject.org/rpms/jakarta-server-pages.git /var/lib/mock/f40-build-2709763-71645/root/chroot_tmpdir/scmroot/jakarta-server-pages
Cloning into '/var/lib/mock/f40-build-2709763-71645/root/chroot_tmpdir/scmroot/jakarta-server-pages'...
$ git fetch origin 09e976c904bb0e89190c9949355c929bc0ac23af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jakarta-server-pages
 * [new ref]         09e976c904bb0e89190c9949355c929bc0ac23af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09e976c Set maven java source and target to 1.8.