$ git clone -n https://src.fedoraproject.org/rpms/stringtemplate.git /var/lib/mock/f41-build-1390743-23558/root/chroot_tmpdir/scmroot/stringtemplate
Cloning into '/var/lib/mock/f41-build-1390743-23558/root/chroot_tmpdir/scmroot/stringtemplate'...
$ git fetch origin 6d358dde04e22ab1f95f51bfcca1dee1c4c6f354:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stringtemplate
 * [new ref]         6d358dde04e22ab1f95f51bfcca1dee1c4c6f354 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d358dd Eliminate use of obsolete %patchN syntax (#2283636)