$ git clone -n https://src.fedoraproject.org/rpms/evince.git /var/lib/mock/f42-build-3273261-41310/root/chroot_tmpdir/scmroot/evince
Cloning into '/var/lib/mock/f42-build-3273261-41310/root/chroot_tmpdir/scmroot/evince'...
$ git fetch origin 1e02c8e07c477a79a0d8ed30033c637837c95f3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/evince
 * [new ref]         1e02c8e07c477a79a0d8ed30033c637837c95f3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e02c8e Determine correct kpathsea header files