$ git clone -n https://src.fedoraproject.org/rpms/golang-github-siddontang.git /var/lib/mock/f40-build-2002181-44680/root/chroot_tmpdir/scmroot/golang-github-siddontang
Cloning into '/var/lib/mock/f40-build-2002181-44680/root/chroot_tmpdir/scmroot/golang-github-siddontang'...
$ git fetch origin 77a8a6eae054d0f8cb4442400c9345a0eb536d81:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-siddontang
 * [new ref]         77a8a6eae054d0f8cb4442400c9345a0eb536d81 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 77a8a6e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild