$ git clone -n https://src.fedoraproject.org/rpms/rust-tempdir.git /var/lib/mock/f40-build-2083946-49976/root/chroot_tmpdir/scmroot/rust-tempdir
Cloning into '/var/lib/mock/f40-build-2083946-49976/root/chroot_tmpdir/scmroot/rust-tempdir'...
$ git fetch origin 70aa0a1af82ecadcc0e4d5a47375da418edb306a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tempdir
 * [new ref]         70aa0a1af82ecadcc0e4d5a47375da418edb306a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 70aa0a1 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild