$ git clone -n https://src.fedoraproject.org/rpms/rubygem-hashicorp-checkpoint.git /var/lib/mock/f45-build-34950-692/root/chroot_tmpdir/scmroot/rubygem-hashicorp-checkpoint
Cloning into '/var/lib/mock/f45-build-34950-692/root/chroot_tmpdir/scmroot/rubygem-hashicorp-checkpoint'...
$ git fetch origin fe3a410c84328235a024dd207f6c9b0b7ed79cbe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-hashicorp-checkpoint
 * [new ref]         fe3a410c84328235a024dd207f6c9b0b7ed79cbe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe3a410 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild