$ git clone -n https://src.fedoraproject.org/rpms/rust-filesize.git /var/lib/mock/f40-build-2036357-48022/root/chroot_tmpdir/scmroot/rust-filesize
Cloning into '/var/lib/mock/f40-build-2036357-48022/root/chroot_tmpdir/scmroot/rust-filesize'...
$ git fetch origin 04e1fce2423adfdfe50052be8637d8fe0069182d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-filesize
 * [new ref]         04e1fce2423adfdfe50052be8637d8fe0069182d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04e1fce Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild