$ git clone -n https://src.fedoraproject.org/rpms/evolution.git /var/lib/mock/f40-build-2236747-53519/root/chroot_tmpdir/scmroot/evolution
Cloning into '/var/lib/mock/f40-build-2236747-53519/root/chroot_tmpdir/scmroot/evolution'...
$ git fetch origin 85ae6ddbcc881d3afc5eb3d660ead198e3f51886:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/evolution
 * [new ref]         85ae6ddbcc881d3afc5eb3d660ead198e3f51886 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 85ae6dd Add a patch to fix a build