$ git clone -n https://src.fedoraproject.org/rpms/xfce4-battery-plugin.git /var/lib/mock/f42-build-side-1-3555820-46656/root/chroot_tmpdir/scmroot/xfce4-battery-plugin
Cloning into '/var/lib/mock/f42-build-side-1-3555820-46656/root/chroot_tmpdir/scmroot/xfce4-battery-plugin'...
$ git fetch origin ead8bcdbea4ff0ba3fc443189d1a39968f113d1b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfce4-battery-plugin
 * [new ref]         ead8bcdbea4ff0ba3fc443189d1a39968f113d1b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ead8bcd Update to v1.2.0; switch to meson build system