$ git clone -n https://src.fedoraproject.org/rpms/kblackbox.git /var/lib/mock/f42-build-863941-172034/root/chroot_tmpdir/scmroot/kblackbox
Cloning into '/var/lib/mock/f42-build-863941-172034/root/chroot_tmpdir/scmroot/kblackbox'...
$ git fetch origin 36086e1ab6634208961228af950c5f0de5808f93:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kblackbox
 * [new ref]         36086e1ab6634208961228af950c5f0de5808f93 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36086e1 24.12.0