$ git clone -n https://src.fedoraproject.org/rpms/rubygem-bcrypt_pbkdf.git /var/lib/mock/f45-build-34793-691/root/chroot_tmpdir/scmroot/rubygem-bcrypt_pbkdf
Cloning into '/var/lib/mock/f45-build-34793-691/root/chroot_tmpdir/scmroot/rubygem-bcrypt_pbkdf'...
$ git fetch origin da94ac12122179bdbb0bc8d8ae7d13ef5d8dbab8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-bcrypt_pbkdf
 * [new ref]         da94ac12122179bdbb0bc8d8ae7d13ef5d8dbab8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da94ac1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild