$ git clone -n https://src.fedoraproject.org/rpms/vulkan-validation-layers.git /var/lib/mock/f39-build-2445742-61041/root/chroot_tmpdir/scmroot/vulkan-validation-layers
Cloning into '/var/lib/mock/f39-build-2445742-61041/root/chroot_tmpdir/scmroot/vulkan-validation-layers'...
$ git fetch origin 5c00e2d574151f9a45302ba645b7d1690c3c4702:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vulkan-validation-layers
 * [new ref]         5c00e2d574151f9a45302ba645b7d1690c3c4702 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c00e2d Remove dependency to vulkan-utility-libraries-devel