$ git clone -n https://src.fedoraproject.org/rpms/golang-github-bradfitz-iter.git /var/lib/mock/f39-build-1442264-32446/root/chroot_tmpdir/scmroot/golang-github-bradfitz-iter
Cloning into '/var/lib/mock/f39-build-1442264-32446/root/chroot_tmpdir/scmroot/golang-github-bradfitz-iter'...
$ git fetch origin 70e649a9783b7b53fa8cec3fa5e9d81e62e772a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-bradfitz-iter
 * [new ref]         70e649a9783b7b53fa8cec3fa5e9d81e62e772a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 70e649a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild