$ git clone -n https://src.fedoraproject.org/rpms/libgcroots.git /var/lib/mock/f33-build-346098-59389/root/chroot_tmpdir/scmroot/libgcroots
Cloning into '/var/lib/mock/f33-build-346098-59389/root/chroot_tmpdir/scmroot/libgcroots'...
$ git reset --hard d18c9da083d5134239319684c84a2e2c6a4e0bbb
HEAD is now at d18c9da New upstream release.   Resolves: rhbz#1871411