$ git clone -n https://src.fedoraproject.org/rpms/vulkan-validation-layers.git /var/lib/mock/f40-build-788458-135161/root/chroot_tmpdir/scmroot/vulkan-validation-layers
Cloning into '/var/lib/mock/f40-build-788458-135161/root/chroot_tmpdir/scmroot/vulkan-validation-layers'...
$ git fetch origin 79a991f7255bf4472678623d0e85db075c10aec6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vulkan-validation-layers
 * [new ref]         79a991f7255bf4472678623d0e85db075c10aec6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79a991f Update to 1.3.275.0 SDK