$ git clone -n https://src.fedoraproject.org/rpms/plasma-desktop.git /var/lib/mock/f42-build-3530242-46318/root/chroot_tmpdir/scmroot/plasma-desktop
Cloning into '/var/lib/mock/f42-build-3530242-46318/root/chroot_tmpdir/scmroot/plasma-desktop'...
$ git fetch origin c2c8f885a8372945f6342b001a38ea6f2fe06c29:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-desktop
 * [new ref]         c2c8f885a8372945f6342b001a38ea6f2fe06c29 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c2c8f88 Rebuild (qt6)