$ git clone -n https://src.fedoraproject.org/rpms/perl-REST-Client.git /var/lib/mock/f45-build-26010-614/root/chroot_tmpdir/scmroot/perl-REST-Client
Cloning into '/var/lib/mock/f45-build-26010-614/root/chroot_tmpdir/scmroot/perl-REST-Client'...
$ git fetch origin 0bf023b9a00e324b51108755cb442baf1f22dd92:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-REST-Client
 * [new ref]         0bf023b9a00e324b51108755cb442baf1f22dd92 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0bf023b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild