$ git clone -n https://src.fedoraproject.org/rpms/cups-pk-helper.git /var/lib/mock/f39-build-1535337-36247/root/chroot_tmpdir/scmroot/cups-pk-helper
Cloning into '/var/lib/mock/f39-build-1535337-36247/root/chroot_tmpdir/scmroot/cups-pk-helper'...
$ git fetch origin da6a471a30911e1142a38e7ed74e9f781e7c8a06:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cups-pk-helper
 * [new ref]         da6a471a30911e1142a38e7ed74e9f781e7c8a06 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da6a471 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild