$ git clone -n https://src.fedoraproject.org/rpms/vulkan-loader.git /var/lib/mock/f40-build-2685169-68009/root/chroot_tmpdir/scmroot/vulkan-loader
Cloning into '/var/lib/mock/f40-build-2685169-68009/root/chroot_tmpdir/scmroot/vulkan-loader'...
$ git fetch origin 619f139cf155994bf9d54c0576f4cbdb97a68320:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vulkan-loader
 * [new ref]         619f139cf155994bf9d54c0576f4cbdb97a68320 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 619f139 Update to 1.3.280.0 SDK