$ git clone -n https://src.fedoraproject.org/rpms/golang-github-letsencrypt-challtestsrv.git /var/lib/mock/f40-build-2288111-55769/root/chroot_tmpdir/scmroot/golang-github-letsencrypt-challtestsrv
Cloning into '/var/lib/mock/f40-build-2288111-55769/root/chroot_tmpdir/scmroot/golang-github-letsencrypt-challtestsrv'...
$ git fetch origin 3b65e13459c25e686c9325d14ce37881331838dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-letsencrypt-challtestsrv
 * [new ref]         3b65e13459c25e686c9325d14ce37881331838dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b65e13 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild