$ git clone -n https://src.fedoraproject.org/rpms/perl-Authen-SASL.git /var/lib/mock/f45-build-21837-588/root/chroot_tmpdir/scmroot/perl-Authen-SASL
Cloning into '/var/lib/mock/f45-build-21837-588/root/chroot_tmpdir/scmroot/perl-Authen-SASL'...
$ git fetch origin 3bdc428cd0731476e1cb33e29bf55e4adf9a9664:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Authen-SASL
 * [new ref]         3bdc428cd0731476e1cb33e29bf55e4adf9a9664 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3bdc428 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild