$ git clone -n https://src.fedoraproject.org/rpms/rubygem-bcrypt.git /var/lib/mock/f40-build-733933-105578/root/chroot_tmpdir/scmroot/rubygem-bcrypt
Cloning into '/var/lib/mock/f40-build-733933-105578/root/chroot_tmpdir/scmroot/rubygem-bcrypt'...
$ git fetch origin 6814aae50a7b41a0ec1bd972290775ed05e1f330:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-bcrypt
 * [new ref]         6814aae50a7b41a0ec1bd972290775ed05e1f330 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6814aae Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild