$ git clone -n https://src.fedoraproject.org/rpms/perl-Tk-ObjScanner.git /var/lib/mock/f45-build-27234-621/root/chroot_tmpdir/scmroot/perl-Tk-ObjScanner
Cloning into '/var/lib/mock/f45-build-27234-621/root/chroot_tmpdir/scmroot/perl-Tk-ObjScanner'...
$ git fetch origin e76a5e87df15d6f139dbce9b7af5c6c3cab510cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Tk-ObjScanner
 * [new ref]         e76a5e87df15d6f139dbce9b7af5c6c3cab510cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e76a5e8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild