$ git clone -n https://src.fedoraproject.org/rpms/evolution-rspam.git /var/lib/mock/f42-build-887250-187952/root/chroot_tmpdir/scmroot/evolution-rspam
Cloning into '/var/lib/mock/f42-build-887250-187952/root/chroot_tmpdir/scmroot/evolution-rspam'...
$ git fetch origin 8af47a5644b40bb36f3413ca3d957631b3069b05:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/evolution-rspam
 * [new ref]         8af47a5644b40bb36f3413ca3d957631b3069b05 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8af47a5 Add patch to fix build with a new gcc