$ git clone -n https://src.fedoraproject.org/rpms/rust-dav1d-sys.git /var/lib/mock/f39-build-1521580-35848/root/chroot_tmpdir/scmroot/rust-dav1d-sys
Cloning into '/var/lib/mock/f39-build-1521580-35848/root/chroot_tmpdir/scmroot/rust-dav1d-sys'...
$ git fetch origin 2a0014a11dd08b9f7aaf4cee4d4d4ea28de6be73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-dav1d-sys
 * [new ref]         2a0014a11dd08b9f7aaf4cee4d4d4ea28de6be73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a0014a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild