$ git clone -n https://src.fedoraproject.org/rpms/rubygem-tty-color.git /var/lib/mock/f45-build-35401-695/root/chroot_tmpdir/scmroot/rubygem-tty-color
Cloning into '/var/lib/mock/f45-build-35401-695/root/chroot_tmpdir/scmroot/rubygem-tty-color'...
$ git fetch origin 5955cbcec17691093938b2c9ed298b54bf5fba60:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-tty-color
 * [new ref]         5955cbcec17691093938b2c9ed298b54bf5fba60 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5955cbc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild