$ git clone -n https://src.fedoraproject.org/rpms/wlroots.git /var/lib/mock/f39-build-2032825-47729/root/chroot_tmpdir/scmroot/wlroots
Cloning into '/var/lib/mock/f39-build-2032825-47729/root/chroot_tmpdir/scmroot/wlroots'...
$ git fetch origin bb0224f81e919df2d5ad2f28c0f84ed0b1ce38cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wlroots
 * [new ref]         bb0224f81e919df2d5ad2f28c0f84ed0b1ce38cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb0224f Apply patches from 0.17.x bugfix branch