$ git clone -n https://src.fedoraproject.org/rpms/tunctl.git /var/lib/mock/f42-build-side-1-3588245-46943/root/chroot_tmpdir/scmroot/tunctl
Cloning into '/var/lib/mock/f42-build-side-1-3588245-46943/root/chroot_tmpdir/scmroot/tunctl'...
$ git fetch origin eca2526057c8e5836b67ca8883a82358926c22a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tunctl
 * [new ref]         eca2526057c8e5836b67ca8883a82358926c22a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eca2526 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild