$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-Rijndael.git /var/lib/mock/f45-build-22639-593/root/chroot_tmpdir/scmroot/perl-Crypt-Rijndael
Cloning into '/var/lib/mock/f45-build-22639-593/root/chroot_tmpdir/scmroot/perl-Crypt-Rijndael'...
$ git fetch origin 1297b475853dcd5db8d77bf35a198038483d5dc0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-Rijndael
 * [new ref]         1297b475853dcd5db8d77bf35a198038483d5dc0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1297b47 Perl 5.44 rebuild