$ git clone -n https://src.fedoraproject.org/rpms/vulkan-validation-layers.git /var/lib/mock/f45-build-38210-722/root/chroot_tmpdir/scmroot/vulkan-validation-layers
Cloning into '/var/lib/mock/f45-build-38210-722/root/chroot_tmpdir/scmroot/vulkan-validation-layers'...
$ git fetch origin 8f186dcc1e0299f480a994a255bce3f90add2d38:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vulkan-validation-layers
 * [new ref]         8f186dcc1e0299f480a994a255bce3f90add2d38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f186dc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild