$ git clone -n https://src.fedoraproject.org/rpms/vulkan-headers.git /var/lib/mock/f39-build-1846985-42129/root/chroot_tmpdir/scmroot/vulkan-headers
Cloning into '/var/lib/mock/f39-build-1846985-42129/root/chroot_tmpdir/scmroot/vulkan-headers'...
$ git fetch origin 88ae54e535f5628a4bf095be97ba180d24c461f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vulkan-headers
 * [new ref]         88ae54e535f5628a4bf095be97ba180d24c461f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88ae54e update to 1.3.268.0 SDK