$ git clone -n https://src.fedoraproject.org/rpms/rubygem-drake.git /var/lib/mock/f45-build-34887-692/root/chroot_tmpdir/scmroot/rubygem-drake
Cloning into '/var/lib/mock/f45-build-34887-692/root/chroot_tmpdir/scmroot/rubygem-drake'...
$ git fetch origin e67e145642f8d86a74ab1d4325d665acd763ae6f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-drake
 * [new ref]         e67e145642f8d86a74ab1d4325d665acd763ae6f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e67e145 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild