$ git clone -n https://src.fedoraproject.org/rpms/vulkan-headers.git /var/lib/mock/f45-build-38206-722/root/chroot_tmpdir/scmroot/vulkan-headers
Cloning into '/var/lib/mock/f45-build-38206-722/root/chroot_tmpdir/scmroot/vulkan-headers'...
$ git fetch origin 232723dd10b25b6cb3239ed488a3426f31d6c102:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vulkan-headers
 * [new ref]         232723dd10b25b6cb3239ed488a3426f31d6c102 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 232723d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild