$ git clone -n https://src.fedoraproject.org/rpms/evolution.git /var/lib/mock/f39-build-1837975-41941/root/chroot_tmpdir/scmroot/evolution
Cloning into '/var/lib/mock/f39-build-1837975-41941/root/chroot_tmpdir/scmroot/evolution'...
$ git fetch origin e6b99764982b2df7487499bfbb973ff2516752f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/evolution
 * [new ref]         e6b99764982b2df7487499bfbb973ff2516752f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6b9976 Update to 3.50.1