$ git clone -n https://src.fedoraproject.org/rpms/perl-Sys-Path.git /var/lib/mock/f45-build-26366-617/root/chroot_tmpdir/scmroot/perl-Sys-Path
Cloning into '/var/lib/mock/f45-build-26366-617/root/chroot_tmpdir/scmroot/perl-Sys-Path'...
$ git fetch origin 112e6b0e5fa3c55c4417cb8c8d686750cc1a39f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sys-Path
 * [new ref]         112e6b0e5fa3c55c4417cb8c8d686750cc1a39f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 112e6b0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild