$ git clone -n https://src.fedoraproject.org/rpms/perl-Text-Trim.git /var/lib/mock/f45-build-27130-621/root/chroot_tmpdir/scmroot/perl-Text-Trim
Cloning into '/var/lib/mock/f45-build-27130-621/root/chroot_tmpdir/scmroot/perl-Text-Trim'...
$ git fetch origin f98476d448e592dbe64dd0daa6bdcef16174e87a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Text-Trim
 * [new ref]         f98476d448e592dbe64dd0daa6bdcef16174e87a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f98476d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild