$ git clone -n https://src.fedoraproject.org/rpms/plasma-wallpapers-dynamic.git /var/lib/mock/f42-build-side-1-3499844-45966/root/chroot_tmpdir/scmroot/plasma-wallpapers-dynamic
Cloning into '/var/lib/mock/f42-build-side-1-3499844-45966/root/chroot_tmpdir/scmroot/plasma-wallpapers-dynamic'...
$ git fetch origin ab343f1f1b6b8618c78d318a8e2967a996c0b291:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-wallpapers-dynamic
 * [new ref]         ab343f1f1b6b8618c78d318a8e2967a996c0b291 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab343f1 Rebuild (qt6)