$ git clone -n https://src.fedoraproject.org/rpms/plasma-systemsettings.git /var/lib/mock/f41-build-824389-154063/root/chroot_tmpdir/scmroot/plasma-systemsettings
Cloning into '/var/lib/mock/f41-build-824389-154063/root/chroot_tmpdir/scmroot/plasma-systemsettings'...
$ git fetch origin 2535733393acc5eed1b1af0e3ca555074736ef0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-systemsettings
 * [new ref]         2535733393acc5eed1b1af0e3ca555074736ef0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2535733 rebuild