$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-WWW-Mechanize.git /var/lib/mock/f45-build-26968-620/root/chroot_tmpdir/scmroot/perl-Test-WWW-Mechanize
Cloning into '/var/lib/mock/f45-build-26968-620/root/chroot_tmpdir/scmroot/perl-Test-WWW-Mechanize'...
$ git fetch origin b88846fe921cb14746802bb61e29fc64e6412530:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-WWW-Mechanize
 * [new ref]         b88846fe921cb14746802bb61e29fc64e6412530 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b88846f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild