$ git clone -n https://src.fedoraproject.org/rpms/plasma-bigscreen.git /var/lib/mock/f40-build-788687-135303/root/chroot_tmpdir/scmroot/plasma-bigscreen
Cloning into '/var/lib/mock/f40-build-788687-135303/root/chroot_tmpdir/scmroot/plasma-bigscreen'...
$ git fetch origin 7a106025dcaac3f30cfe3a160f5adb3aaaff69ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-bigscreen
 * [new ref]         7a106025dcaac3f30cfe3a160f5adb3aaaff69ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a10602 Upgrade to qt6