$ git clone -n https://src.fedoraproject.org/rpms/rubygem-rack-protection.git /var/lib/mock/f45-build-35220-694/root/chroot_tmpdir/scmroot/rubygem-rack-protection
Cloning into '/var/lib/mock/f45-build-35220-694/root/chroot_tmpdir/scmroot/rubygem-rack-protection'...
$ git fetch origin fe7ebe30eeaeddcfe7703f1ca5e5a98b39778b56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-rack-protection
 * [new ref]         fe7ebe30eeaeddcfe7703f1ca5e5a98b39778b56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe7ebe3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild