$ git clone -n https://src.fedoraproject.org/rpms/kookbook.git /var/lib/mock/f42-build-3346799-45002/root/chroot_tmpdir/scmroot/kookbook
Cloning into '/var/lib/mock/f42-build-3346799-45002/root/chroot_tmpdir/scmroot/kookbook'...
$ git fetch origin 23e282c697a2cee158e29c37f1177a46184699f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kookbook
 * [new ref]         23e282c697a2cee158e29c37f1177a46184699f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23e282c Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild