$ git clone -n https://src.fedoraproject.org/rpms/golang-github-jackc-pgproto3.git /var/lib/mock/f45-build-12080-437/root/chroot_tmpdir/scmroot/golang-github-jackc-pgproto3
Cloning into '/var/lib/mock/f45-build-12080-437/root/chroot_tmpdir/scmroot/golang-github-jackc-pgproto3'...
$ git fetch origin f15e074cb1ce02b0e905709469d8e5dacee9c889:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-jackc-pgproto3
 * [new ref]         f15e074cb1ce02b0e905709469d8e5dacee9c889 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f15e074 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild