$ git clone -n https://src.fedoraproject.org/rpms/golang-github-mitchellh-mapstructure.git /var/lib/mock/f45-build-12256-440/root/chroot_tmpdir/scmroot/golang-github-mitchellh-mapstructure
Cloning into '/var/lib/mock/f45-build-12256-440/root/chroot_tmpdir/scmroot/golang-github-mitchellh-mapstructure'...
$ git fetch origin 79346f7caae18f130f655b4d1a5fd98be2e3a371:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-mitchellh-mapstructure
 * [new ref]         79346f7caae18f130f655b4d1a5fd98be2e3a371 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79346f7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild