$ git clone -n https://src.fedoraproject.org/rpms/golang-x-mod.git /var/lib/mock/f45-build-20311-569/root/chroot_tmpdir/scmroot/golang-x-mod
Cloning into '/var/lib/mock/f45-build-20311-569/root/chroot_tmpdir/scmroot/golang-x-mod'...
$ git fetch origin 65c5465798099951d8d69a9960b06c2b744a8e9d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-x-mod
 * [new ref]         65c5465798099951d8d69a9960b06c2b744a8e9d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65c5465 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild