$ git clone -n https://src.fedoraproject.org/rpms/vulkan-loader.git /var/lib/mock/f45-build-38207-722/root/chroot_tmpdir/scmroot/vulkan-loader
Cloning into '/var/lib/mock/f45-build-38207-722/root/chroot_tmpdir/scmroot/vulkan-loader'...
$ git fetch origin ef81d2b80aa38f928077b3d63a46ae823557b365:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vulkan-loader
 * [new ref]         ef81d2b80aa38f928077b3d63a46ae823557b365 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef81d2b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild