$ git clone -n https://src.fedoraproject.org/rpms/golang-github-lestrrat-option.git /var/lib/mock/f45-build-12180-439/root/chroot_tmpdir/scmroot/golang-github-lestrrat-option
Cloning into '/var/lib/mock/f45-build-12180-439/root/chroot_tmpdir/scmroot/golang-github-lestrrat-option'...
$ git fetch origin 5e79cb616d51bae7fe31a620fdcada2bd5aea840:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-lestrrat-option
 * [new ref]         5e79cb616d51bae7fe31a620fdcada2bd5aea840 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e79cb6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild