$ git clone -n https://src.fedoraproject.org/rpms/perl-CBOR-XS.git /var/lib/mock/f45-build-21895-588/root/chroot_tmpdir/scmroot/perl-CBOR-XS
Cloning into '/var/lib/mock/f45-build-21895-588/root/chroot_tmpdir/scmroot/perl-CBOR-XS'...
$ git fetch origin eee15913b01e35ffe0f14661be33e66c600650b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CBOR-XS
 * [new ref]         eee15913b01e35ffe0f14661be33e66c600650b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eee1591 Perl 5.44 rebuild