$ git clone -n https://src.fedoraproject.org/rpms/evolution-ews.git /var/lib/mock/f39-build-2119072-50731/root/chroot_tmpdir/scmroot/evolution-ews
Cloning into '/var/lib/mock/f39-build-2119072-50731/root/chroot_tmpdir/scmroot/evolution-ews'...
$ git fetch origin 86a9dbc58feb7df286771d2af9498f6d15425d05:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/evolution-ews
 * [new ref]         86a9dbc58feb7df286771d2af9498f6d15425d05 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86a9dbc Backport upstream patch to workaround broken text/calendar mail attachments by the server