$ git clone -n https://src.fedoraproject.org/rpms/plasma-welcome.git /var/lib/mock/f40-build-2536736-61850/root/chroot_tmpdir/scmroot/plasma-welcome
Cloning into '/var/lib/mock/f40-build-2536736-61850/root/chroot_tmpdir/scmroot/plasma-welcome'...
$ git fetch origin d67cd44418d94ba1b6cd0a381607b27cf272ac27:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-welcome
 * [new ref]         d67cd44418d94ba1b6cd0a381607b27cf272ac27 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d67cd44 6.0.2