$ git clone -n https://src.fedoraproject.org/rpms/perl-MailTools.git /var/lib/mock/f45-build-24651-605/root/chroot_tmpdir/scmroot/perl-MailTools
Cloning into '/var/lib/mock/f45-build-24651-605/root/chroot_tmpdir/scmroot/perl-MailTools'...
$ git fetch origin f5140594cd9ec8997830f7f936f6ff48aee9fdb5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-MailTools
 * [new ref]         f5140594cd9ec8997830f7f936f6ff48aee9fdb5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f514059 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild