$ git clone -n https://src.fedoraproject.org/rpms/rubygem-rbvmomi.git /var/lib/mock/f45-build-35273-694/root/chroot_tmpdir/scmroot/rubygem-rbvmomi
Cloning into '/var/lib/mock/f45-build-35273-694/root/chroot_tmpdir/scmroot/rubygem-rbvmomi'...
$ git fetch origin d6a9500ff06b02d49df45ec06fa35203c5b514ce:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-rbvmomi
 * [new ref]         d6a9500ff06b02d49df45ec06fa35203c5b514ce -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d6a9500 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild