$ git clone -n https://src.fedoraproject.org/rpms/perl-PSGI.git /var/lib/mock/f45-build-25648-612/root/chroot_tmpdir/scmroot/perl-PSGI
Cloning into '/var/lib/mock/f45-build-25648-612/root/chroot_tmpdir/scmroot/perl-PSGI'...
$ git fetch origin 0721dcac323302b7da748b18a58c1c1c0bce1893:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-PSGI
 * [new ref]         0721dcac323302b7da748b18a58c1c1c0bce1893 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0721dca Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild