$ git clone -n https://src.fedoraproject.org/rpms/preprocess.git /var/lib/mock/f39-build-1490645-34507/root/chroot_tmpdir/scmroot/preprocess
Cloning into '/var/lib/mock/f39-build-1490645-34507/root/chroot_tmpdir/scmroot/preprocess'...
$ git fetch origin b43a282ac3e3b5967359b7b851cfc1615bf9852a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/preprocess
 * [new ref]         b43a282ac3e3b5967359b7b851cfc1615bf9852a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b43a282 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild