$ git clone -n https://src.fedoraproject.org/rpms/perl-Cairo.git /var/lib/mock/f45-build-22190-590/root/chroot_tmpdir/scmroot/perl-Cairo
Cloning into '/var/lib/mock/f45-build-22190-590/root/chroot_tmpdir/scmroot/perl-Cairo'...
$ git fetch origin 789f1c26b9cf4f1027d185f3f12308dee5ad34e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Cairo
 * [new ref]         789f1c26b9cf4f1027d185f3f12308dee5ad34e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 789f1c2 Perl 5.44 rebuild