$ git clone -n https://src.fedoraproject.org/rpms/rubygem-typhoeus.git /var/lib/mock/f45-build-35399-695/root/chroot_tmpdir/scmroot/rubygem-typhoeus
Cloning into '/var/lib/mock/f45-build-35399-695/root/chroot_tmpdir/scmroot/rubygem-typhoeus'...
$ git fetch origin adebd07e037a3da38cecc2f3ab6a9c7b7bf945e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-typhoeus
 * [new ref]         adebd07e037a3da38cecc2f3ab6a9c7b7bf945e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at adebd07 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild