$ git clone -n https://src.fedoraproject.org/rpms/perl-AutoXS-Header.git /var/lib/mock/f45-build-21827-588/root/chroot_tmpdir/scmroot/perl-AutoXS-Header
Cloning into '/var/lib/mock/f45-build-21827-588/root/chroot_tmpdir/scmroot/perl-AutoXS-Header'...
$ git fetch origin a663e63c6bd387393b554c1fb5694ad325f3e3fc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-AutoXS-Header
 * [new ref]         a663e63c6bd387393b554c1fb5694ad325f3e3fc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a663e63 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild