$ git clone -n https://src.fedoraproject.org/rpms/mtx.git /var/lib/mock/f40-build-2012142-45772/root/chroot_tmpdir/scmroot/mtx
Cloning into '/var/lib/mock/f40-build-2012142-45772/root/chroot_tmpdir/scmroot/mtx'...
$ git fetch origin f5a029644baccc055eaa9a513bd8004e901a474a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mtx
 * [new ref]         f5a029644baccc055eaa9a513bd8004e901a474a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f5a0296 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild