$ git clone -n https://src.fedoraproject.org/rpms/jakarta-server-pages.git /var/lib/mock/f41-build-750613-13382/root/chroot_tmpdir/scmroot/jakarta-server-pages
Cloning into '/var/lib/mock/f41-build-750613-13382/root/chroot_tmpdir/scmroot/jakarta-server-pages'...
$ git fetch origin 425df88bdd9064f76cafc71092f90e6847112dc1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jakarta-server-pages
 * [new ref]         425df88bdd9064f76cafc71092f90e6847112dc1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 425df88 Set maven java source and target to 1.8, closes rhbz#2266653