$ git clone -n https://src.fedoraproject.org/rpms/perl-Cairo-GObject.git /var/lib/mock/f45-build-22179-590/root/chroot_tmpdir/scmroot/perl-Cairo-GObject
Cloning into '/var/lib/mock/f45-build-22179-590/root/chroot_tmpdir/scmroot/perl-Cairo-GObject'...
$ git fetch origin f7501ee84420d1c765e2d453edb6540a9617e831:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Cairo-GObject
 * [new ref]         f7501ee84420d1c765e2d453edb6540a9617e831 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f7501ee Perl 5.44 rebuild