$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-IRC.git /var/lib/mock/f45-build-25323-610/root/chroot_tmpdir/scmroot/perl-Net-IRC
Cloning into '/var/lib/mock/f45-build-25323-610/root/chroot_tmpdir/scmroot/perl-Net-IRC'...
$ git fetch origin 3066f886106aa3206838cb904c7db620868c6b5f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-IRC
 * [new ref]         3066f886106aa3206838cb904c7db620868c6b5f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3066f88 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild