$ git clone -n https://src.fedoraproject.org/rpms/jackson-modules-base.git /var/lib/mock/f38-build-side-42-init-devel-799575-28093/root/chroot_tmpdir/scmroot/jackson-modules-base
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-799575-28093/root/chroot_tmpdir/scmroot/jackson-modules-base'...
$ git fetch origin 1b843082d5d404d90f9f68bc6673c672598a6119:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jackson-modules-base
 * [new ref]         1b843082d5d404d90f9f68bc6673c672598a6119 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1b84308 Remove dependency on jaxb-api2 compat package