$ git clone -n https://src.fedoraproject.org/rpms/golang-github-jackc-pgconn.git /var/lib/mock/f38-build-side-42-init-devel-821017-28340/root/chroot_tmpdir/scmroot/golang-github-jackc-pgconn
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-821017-28340/root/chroot_tmpdir/scmroot/golang-github-jackc-pgconn'...
$ git fetch origin 15cf83ce2378e7ff37174e216373a339277b14f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-jackc-pgconn
 * [new ref]         15cf83ce2378e7ff37174e216373a339277b14f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15cf83c Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild