$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-XMPP.git /var/lib/mock/f45-build-25496-611/root/chroot_tmpdir/scmroot/perl-Net-XMPP
Cloning into '/var/lib/mock/f45-build-25496-611/root/chroot_tmpdir/scmroot/perl-Net-XMPP'...
$ git fetch origin 7122fb5d4b42a24c5912f625f4e4c43443332177:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-XMPP
 * [new ref]         7122fb5d4b42a24c5912f625f4e4c43443332177 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7122fb5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild