$ git clone -n https://src.fedoraproject.org/rpms/rust-backtrace.git /var/lib/mock/f39-build-1779165-41533/root/chroot_tmpdir/scmroot/rust-backtrace
Cloning into '/var/lib/mock/f39-build-1779165-41533/root/chroot_tmpdir/scmroot/rust-backtrace'...
$ git fetch origin 16bfa49d52c1c571c7dce8bb090171ca245bf33b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-backtrace
 * [new ref]         16bfa49d52c1c571c7dce8bb090171ca245bf33b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 16bfa49 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild